[PATCH v2 7/7] x86/CPU/AMD: Output the AGESA version to the logs

Mario Limonciello (AMD)
2025-12-16T12:34:25Z

On AMD Zen platforms that are running AGESA, there is sometimes
DMI additional string for the AGESA version that can be helpful when
debugging an issue. If this string is found output to kernel logs.

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
---
arch/x86/kernel/cpu/amd.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index c19c4ee74dd1f..8f44439d3f993 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
#define pr_fmt(fmt) "x86/amd: " fmt

+#include <linux/dmi.h>
#include <linux/export.h>
#include <linux/bitops.h>
#include <linux/elf.h>
@@ -1406,3 +1407,20 @@ static __init int print_s5_reset_status_mmio(void)
return 0;
}
late_initcall(print_s5_reset_status_mmio);
+
+#ifdef CONFIG_DMI
+static __init int print_agesa_dmi_info(void)
+{
+ const struct dmi_device *dev = NULL;
+
+ while ((dev = dmi_find_device(DMI_DEV_TYPE_ADDITIONAL, NULL, dev))) {
+ if (!strncmp(dev->name, "AGESA", 5)) {
+ pr_info("%s\n", dev->name);
+ break;
+ }
+ }
+
+ return 0;
+}
+late_initcall(print_agesa_dmi_info);
+#endif
--
2.43.0